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He Built A 1,000-Hp. Duramax Engine
Bryan Woitas of Fort Saskatchewan, Alberta, has built his dream Duramax diesel engine after 8 years of hard work. His 1,000-hp. LB7 was constructed at home with aftermarket parts and a tenacity for problem-solving.
Woitas grew interested in diesel power after experimenting with mild power adders on his ’02 Chevrolet Silverado 2,500 HD that got the truck in racing condition. This included fuel system upgrades. He raced his custom truck at local events for 4 years and achieved several first-place finishes. Unfortunately, the heavy use wore it down after 4 years, and the factory LB7 threw a rod out of the engine block.
This left Woitas without a running truck but ample time to plan his next move. He used social media to connect with leaders in the diesel industry to take the first steps toward upgrading the engine.
“The thing I loved most was that I was able to do most of the work myself,” says Woitas. “It taught me to focus on attention to detail and patience.”
Woitas sourced proven aftermarket parts for most of the upgrades. These included Carrillo rods, ported and polished heads, Mahle Motorsport 0.020-in. over pistons, a Stage 2 camshaft from Extreme Engine Development, an ATI damper, Industrial Injection threaded injector cups, and SoCal billet injector hold-downs, and plenty of ARP fasteners to keep things in place.
The engine gets most of its power through a fuel and air combo with a PPE Dual Fueler CP3 kit designed to deliver precise amounts of fuel, a Lincoln Diesel Specialties 100 percent over injectors, and a FASS fuel system. It optimizes the power sent to the wheels through Allison 1000 sports components from ATS, Inglewood, PPE, and Deviant Race Parts cooler lines.
The truck still runs on Woitas’ original transmission build. While it works without issue, the transmission isn’t designed to handle the horsepower it now is subject to. Once it inevitably breaks down, Woitas will perform a refresh and upgrade parts through the parts supplier No Zone Diesel.
Woitas also modified the axle, suspension, and steering of his Silverado. He built custom traction bars, removed the overload leaf springs used Beltech drop shackles to lower the rear four inches. There are 2 in. of drop up front due to Beltech drop spindles and flipped MaxxCam torsion bar keys from Suspension Maxx.
Woitas now has the Duramax-powered truck of his dreams. Since he was able to buy second-hand quality used parts, overall costs were around $26,000 CAD as opposed to $40,000 plus if he had gone to a shop and purchased new parts. He recently completed the LB7’s break-in period and is ready to take it on the racing circuit.
Contact: FARM SHOW Followup, Bryan Woitas (Instagram: @bslickcustomz).


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2023 - Volume #47, Issue #5